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VAPOR PRESSURE SENSOR Toyota Sienna I

Engine Controls - System & Component Testing - V6 & V8 6 illustrations ~502 words

VAPOR PRESSURE SENSOR

For testing of vapor pressure sensor, see VAPOR PRESSURE SENSOR under FUEL EVAPORATION SYSTEM under EMISSION SYSTEMS & SUB-SYSTEMS.

VVT sensor may also be referred to as camshaft position sensor. For testing of camshaft position sensor, see CAMSHAFT POSITION SENSOR RESISTANCE under IGNITION SYSTEMS in BASIC DIAGNOSTIC PROCEDURES - V6 & V8 article.

  1. Wheel speed sensors on each wheel deliver an input signal to Anti-Lock Brake System (ABS) Electronic Control Unit (ECU). ABS ECU converts input signals from wheel speed sensors to a 4-pulse input signal to the instrument cluster. Instrument cluster then converts 4-pulse input signal to a rectangular waveform and then sends input signal to Engine Control Module (ECM).
  2. If problem exists with vehicle speed sensor, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article.
  1. Vehicle speed sensor is located on transaxle. (Scheme 136) Remove vehicle speed sensor. Connect voltmeter positive lead to terminal No. 3 (outer terminal) and negative lead to terminal No. 2 (center terminal) on vehicle speed sensor. (Scheme 137)
  2. Using jumper wires, connect positive battery terminal to terminal No. 1 (outer terminal) and negative battery terminal to terminal No. 2 (center terminal) on vehicle speed sensor. (Scheme 137)
  3. While rotating vehicle speed sensor shaft, ensure voltage changes from zero volts to at least 11 volts. Voltage should change 4 times per revolution of the shaft. Replace vehicle speed sensor if voltage does not change as specified. Remove test equipment.

Scheme 136

Scheme 136
Scheme 136

Scheme 137

Scheme 137
Scheme 137

Vehicle speed sensor is located on transmission. (Scheme 138) Testing information is not available from manufacturer.

Scheme 138

Scheme 138: Land Cruiser
Scheme 138: Land Cruiser
  1. Wheel speed sensors on each wheel deliver an input signal to Anti-Lock Brake System (ABS) Electronic Control Unit (ECU). ABS ECU converts input signals from wheel speed sensors to a 4-pulse input signal to the instrument cluster. Instrument cluster then converts 4-pulse input signal to a rectangular waveform and then sends input signal to Engine Control Module (ECM).
  2. If problem exists with vehicle speed sensor, a Diagnostic Trouble Code (DTC) will be stored in Engine Control Module (ECM). See RETRIEVING DIAGNOSTIC TROUBLE CODES under SELF-DIAGNOSTIC SYSTEM in SELF-DIAGNOSTICS - INTRODUCTION article.

Scheme 139

Scheme 139: Tacoma
Scheme 139: Tacoma

Scheme 140

Scheme 140
Scheme 140

Scheme 141

Scheme 141
Scheme 141
  1. Vehicle speed sensor is mounted near rear of transmission or transfer case and contains a 3-pin electrical connector. Electrical connector contains Blue, Green/Red and Pink wires.
  2. Connect voltmeter positive lead to terminal No. 3 (outer terminal) and negative lead to terminal No. 2 (center terminal) on vehicle speed sensor. (Scheme 139)- (Scheme 141).
  3. Using jumper wires, connect positive battery terminal to terminal No. 1 (outer terminal) and negative battery terminal to terminal No. 2 (center terminal) on vehicle speed sensor. (Scheme 139)- (Scheme 141).
  4. While rotating vehicle speed sensor shaft, ensure voltage changes from zero volts to at least 11 volts. Voltage should change 4 times per revolution of the shaft. Replace vehicle speed sensor if voltage does not change as specified. Remove test equipment.